Changeset: 9aa0797dc3ce for MonetDB
URL: https://dev.monetdb.org/hg/MonetDB/rev/9aa0797dc3ce
Modified Files:
gdk/gdk_bbp.c
Branch: default
Log Message:
Pre-allocate the first section of the BBP.
diffs (43 lines):
diff --git a/gdk/gdk_bbp.c b/gdk/gdk_bbp.c
--- a/gdk/gdk_bbp.c
+++ b/gdk/gdk_bbp.c
@@ -101,8 +101,9 @@
* are found in O(1) by keeping a freelist that uses the 'next' field
* in the BBPrec records.
*/
-BBPrec *BBP[N_BBPINIT]; /* fixed base VM address of BBP array */
-bat BBPlimit = 0; /* current committed VM BBP array */
+static BBPrec BBP0[BBPINIT];
+BBPrec *BBP[N_BBPINIT] = {[0] = BBP0}; /* fixed base VM address of BBP array */
+bat BBPlimit = BBPINIT; /* current committed VM BBP array */
static ATOMIC_TYPE BBPsize = ATOMIC_VAR_INIT(0); /* current used size of BBP
array */
struct BBPfarm_t BBPfarms[MAXFARMS];
@@ -1951,8 +1952,10 @@ BBPinit(bool allow_hge_upgrade)
}
/* scan the BBP.dir to obtain current size */
- BBPlimit = 0;
+ BBPlimit = BBPINIT;
+ memset(BBP0, 0, sizeof(BBP0));
memset(BBP, 0, sizeof(BBP));
+ BBP[0] = BBP0;
bat bbpsize;
bbpsize = 1;
@@ -4685,13 +4688,14 @@ gdk_bbp_reset(void)
int i;
BBP_free = 0;
- while (BBPlimit > 0) {
+ while (BBPlimit > BBPINIT) {
BBPlimit -= BBPINIT;
assert(BBPlimit >= 0);
GDKfree(BBP[BBPlimit >> BBPINITLOG]);
BBP[BBPlimit >> BBPINITLOG] = NULL;
}
ATOMIC_SET(&BBPsize, 0);
+ memset(BBP0, 0, sizeof(BBP0));
for (i = 0; i < MAXFARMS; i++)
GDKfree((void *) BBPfarms[i].dirname); /* loose "const" */
memset(BBPfarms, 0, sizeof(BBPfarms));
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